package com.example.diagnodroid.ecran;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.util.AttributeSet;
import android.view.View;

public class DrawView extends View {
	private Bitmap mBitmap;
	private Canvas mCanvas;
	private Path mPath;
	private Paint mBitmapPaint;
	private Paint mPaint;

	public DrawView(Context c, AttributeSet attributeSet) {
		super(c, attributeSet);

		mPath = new Path();
		mBitmapPaint = new Paint(Paint.DITHER_FLAG);

		mPaint = new Paint();
		mPaint.setAntiAlias(true);
		mPaint.setDither(true);
		mPaint.setColor(Color.BLUE);
		mPaint.setStyle(Paint.Style.STROKE);
		mPaint.setStrokeJoin(Paint.Join.ROUND);
		mPaint.setStrokeCap(Paint.Cap.ROUND);
		mPaint.setStrokeWidth(12);
	}

	@Override
	protected void onSizeChanged(int w, int h, int oldw, int oldh) {
		super.onSizeChanged(w, h, oldw, oldh);
		mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
		mCanvas = new Canvas(mBitmap);
	}

	@Override
	protected void onDraw(Canvas canvas) {
		canvas.drawColor(0xFFAAAAAA);
		canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);
		canvas.drawPath(mPath, mPaint);
	}

	private float mX, mY;
	private static final float TOUCH_TOLERANCE = 4;

	public void touch_start(float x, float y) {
		mPath.reset();
		mPath.moveTo(x, y);
		mX = x;
		mY = y;
	}

	public void touch_move(float x, float y) {
		float dx = Math.abs(x - mX);
		float dy = Math.abs(y - mY);
		if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {
			mPath.quadTo(mX, mY, (x + mX) / 2, (y + mY) / 2);
			mX = x;
			mY = y;
		}
	}

	public void touch_up() {
		mPath.lineTo(mX, mY);
		mCanvas.drawPath(mPath, mPaint);
		mPath.reset();
	}

	public void resetDraw() {
		draw(mCanvas);
		postInvalidate();
	}

}
